双金属银铜氧化物溴化刻蚀制备多孔纳米CuO及其硫化氢气体传感性能研究
Porous CuO from Ag2Cu2Ox(x=3 or 4)Etched by CTAB for H2S Gas Sensing
张蒙 1秦庸博 1张富豪 1奉雨静 1Seda Nur Ozer 1孙文龙 1赵永明 1许章炼1
作者信息
- 1. 西安交通大学能源与动力工程研究院 西安 710049
- 折叠
摘要
基于十六烷基三甲基溴化铵(CTAB)对双金属银铜氧化物Ag2Cu2Ox的刻蚀及硫代硫酸钠溶解副产物AgBr的方法制备了两种多孔纳米CuO骨架结构,并且利用X射线衍射仪、X射线光电子能谱仪和洛伦兹透射电镜进一步研究了刻蚀机理,结果表明CuO有独特的形貌结构和更大的比表面积.利用所制备的氧化铜具有大孔隙和多位点的优势,开展了 H2S气体传感实验.实验结果显示,在150℃的较低温度下纳米CuO传感器对0.0005‰ H2S仍具有1.7(CuO-Ag2Cu2O3)和1.3(CuO-Ag2Cu2O4)的灵敏度值,响应和恢复时间短,具有良好的选择性和长期稳定性;未来还可以通过构建异质结或者贵金属修饰多孔氧化铜来进一步提高传感性能.
Abstract
Two nanoporous CuO skeleton structures were prepared based on the etching of Ag2Cu2Ox by CTAB and the dissolution of AgBr by sodium thiosulphate,the etching mechanism was further investigated using XRD,XPS and TEM.Tests showed that the CuO had unique morphology and large specific surface areas.H2S gas sensing experiments were carried out based on CuO with large pores and multiple sites.The sensors based on nano-CuO skeleton structures demonstrated the sensitivity of 1.7(CuO-Ag2Cu2O3)and 1.3(CuO-Ag2Cu2O4)for 0.0005％o H2S at a low temperature of 150 ℃.The response and recovery time of the sensors were short and a long-term stability was observed for the sensors.In the future,the performance could be further improved by constructing heterojunction or modifying porous copper oxide with noble metals.
关键词
双金属银铜氧化物/CTAB/多孔氧化铜/H2S传感Key words
Bimetallic silver-copper oxides/CTAB/Porous copper oxides/H2S sensing引用本文复制引用
基金项目
国家自然科学基金(21906128)
西安交通大学青年拔尖人才基金(7121181102)
出版年
2024
NETL
NSTL
万方数据